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All Power Windows Inoperative

WARNING: This page is about a different car, the 1997 Lincoln Mark VIII. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check Power Supply To Master Switch  - Turn ignition switch to OFF position. Disconnect master switch 4-pin connector. Turn ignition switch to RUN position. Measure voltage between ground and Tan/Yellow wire at 4-pin connector. If battery voltage is present, go to next step. If battery voltage is not present, go to step 3).
  2. Check Black Wire  - Turn ignition switch to OFF position. Disconnect master switch 5-pin connector. Measure resistance between ground and Black wire at 5-pin connector. If resistance is less than 5 ohms, replace master window switch. If resistance is greater than 5 ohms, repair open in Black wire. Retest system.
  3. Check Sliding Roof Panel Operation  - Turn ignition switch to RUN position. Operate sliding roof panel. If sliding roof panel does not operate, go to next step. If sliding roof panel operates, go to step 5).
  4. Check Black/Yellow Wire  - Turn ignition switch to OFF position. Disconnect 26-pin SCIL (Steering Column Ignition and Lighting) control module connector. Disconnect delayed accessory relay No. 1 and No. 2. Measure resistance in Black/Yellow wire between 26-pin SCIL connector and delayed accessory relay No. 2 connector. If resistance is less than 5 ohms, replace SCIL module. If resistance is greater than 5 ohms, repair open in Black/Yellow wire. Retest system.
  5. Check Input To Delayed Accessory Relay  - Turn ignition switch to OFF position. Disconnect accessory delay relay No. 2. Turn ignition switch to RUN position. Using NGS tester, access SCIL module active command one-touch window down and ACCY delay. Trigger ACCY RLY ON. Measure resistance between ground and Black/Yellow wire at delayed accessory relay No. 2 connector. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, repair open in Black/Yellow wire. Retest system.
  6. Check White/Yellow Wire  - Measure voltage between ground and both White/Yellow wires at delayed accessory relay No. 2 connector. If battery voltage is present at both terminals, go to next step. If battery voltage is not present at both terminals, repair open in White/Yellow wire. Retest system.
  7. Check Tan/Yellow Wire For Short To Ground  - Measure resistance between ground and Tan/Yellow wire at delayed accessory relay No. 2 connector. If resistance is less than 10 k/ohms, go to next step. If resistance is greater than 10 k/ohms, go to step 11).
  8. Check Driver's Door Module For Short To Ground  - Disconnect driver's door module 4-pin connector. Measure resistance between ground and Tan/Yellow wire at delayed accessory relay No. 2 connector. If resistance is less than 10 k/ohms, go to next step. If resistance is greater than 10 k/ohms, replace driver's door module. Retest system.
  9. Check Master Window Switch For Short To Ground  - Disconnect master window switch 4-pin connector. Measure resistance between ground and Tan/Yellow wire at delayed accessory relay No. 2 connector. If resistance is less than 10 k/ohms, go to next step. If resistance is greater than 10 k/ohms, replace master window switch. Retest system.
  10. Check Passenger Window Switch For Short To Ground  - Disconnect passenger window switch connector. Measure resistance between ground and Tan/Yellow wire at delayed accessory relay No. 2 connector. If resistance is less than 10 k/ohms, go to next step. If resistance is greater than 10 k/ohms, replace passenger window switch. Retest system.
  11. Check Tan/Yellow Wire For Open  - Measure resistance in Tan/Yellow wire between delayed accessory relay No. 2 and master window switch. If resistance is less than 5 ohms, replace delayed accessory relay No. 2. If resistance is greater than 5 ohms, repair open in Tan/Yellow wire. Retest system.
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